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WHERE IN syntax for Exist/Not Exist
Message
De
29/01/2017 10:57:36
Michel Fournier
Level Extreme Inc.
Petit-Rocher, Nouveau-Brunswick, Canada
 
 
À
29/01/2017 10:55:51
Christian Isberner
Hannover, Allemagne
Information générale
Forum:
Microsoft SQL Server
Catégorie:
Syntaxe SQL
Titre:
Re: WHERE IN syntax for Exist/Not Exist
Versions des environnements
SQL Server:
SQL Server 2014
OS:
Windows 8.1
Network:
Windows Server 2012
Divers
Thread ID:
01647092
Message ID:
01647114
Vues:
31
>What I learned is that IN with a subquery is always very poor performance and should never be done. Always use Exists instead.
>
>http://stackoverflow.com/questions/2065329/sql-server-in-vs-exists-performance

Thanks
Michel Fournier
Level Extreme Inc.
Designer, architect, owner of the Level Extreme Platform
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